POLICRYPS-based electrically switchable Bragg reflector

被引：14

作者：

De Sio, Luciano ^{[1
,2
]}

Tabiryan, Nelson ^{[1
]}

Bunning, Timothy J. ^{[3
]}

机构：

[1] Beam Engn Adv Measurements Co, Orlando, FL 32789 USA

[2] Univ Calabria, Ctr Excellence Study Innovat Funct Mat, Dept Phys, I-87036 Arcavacata Di Rende, Italy

[3] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 25期

关键词：

DISPERSED LIQUID-CRYSTALS; PHOTONIC CRYSTALS; GRATINGS; FABRICATION; PHASE;

D O I：

10.1364/OE.23.032696

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The formation and characterization of a switchable volume reflective element fabricated from a polymer liquid crystal (LC) polymer slice (POLICRYPS) structure by holographic photopolymerization at high temperature (65 degrees C) using a photosensitive/nematic liquid crystal prepolymer mixture is reported. The submicron Bragg structure formed consists of periodic continuous polymeric walls separated by periodic LC channels. The phase separated NLC self-aligns in a homeotropic alignment between the polymer walls as indicated by polarizing optical microscopy analysis (Maltese cross). The resulting periodic grating structure results in a Bragg reflection notch upon illumination with white light due to the periodic variation in refractive index. Electro-optical experiments realized through in-plane electrodes and temperature experiments confirm that the multilayer structure acts as a Bragg mirror whose reflection efficiency can be controlled by either a small (similar to 3V/mu m) electric field or temperature. (C) 2015 Optical Society of America

引用

页码：32696 / 32702

页数：7

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